A number of legitimate Web sites have been attacked recently.
In one example, a popular site for computer programmers/coders and technical users, GitHub, was attacked for several days by a group based in China. Although just one example, the trend seems to be that no specific industry or groups are immune to such attacks, not even hackers themselves.
For example, Check Point Software Technologies recently discovered that hundreds of sites, including defense contractors, telecommunication operators, media groups, education, and more had been hacked and that the breach had gone undiscovered for over two years. Rather than spear-phishing or drive-by-downloads, the cyber espionage groups responsible were found to be targeting Web servers that were not adequately protected as the entry point vector.